green transport hierarchy
- A few comments on Chris Bradshaw's paper.
1. Use of public transport does have one important positive factor which should
be factored in: it helps to keep the system going by reducing both cost and
energy efficiency on a per passenger basis.
2. In classifying modes of transport by energy source one must factor in their
substitutibility. For example using hydrogen generated from renewable sources is
not an advantage over fossil fuels if those renewable sources could otherwise be
used to generate electricity that would otherwise need fossil fuels to generate.
(And if the hydrogen is generated from fossil fuels it is no advantage at all
except for local air quality.)
3. Small vehicles are only an advantage over large ones if the number of
passengers is kept constant.
4. For trip purposes, multi-purpose trips will usually score higher than single
5. Why "don't ban street parking/stopping" at peak (or other) times ? Last week
I did a bus trip in inner (but not central) London which took nearly an hour for
about 4 miles -- because there were two diversions due to major road closures
and in both cases the bus couldn't get through on its diversion route due to